Allelism of Endosperm Balance Number (EBN) in Mexican tuber-bearing Solanum species

1990 ◽  
Vol 80 (2) ◽  
pp. 161-166 ◽  
Author(s):  
J. B. Bamberg ◽  
R. E. Hanneman
Keyword(s):  
Solanum Species ◽  
Endosperm Balance Number

The Role of 2n Gametes and Endosperm Balance Number in the Origin and Evolution of Polyploids in the Tuber-Bearing Solanums

Genetics ◽  
2003 ◽  
Vol 163 (1) ◽  
pp. 287-294 ◽  
Author(s):  
Domenico Carputo ◽  
Luigi Frusciante ◽  
Stanley J Peloquin
Keyword(s):  
Parental Species ◽  
2N Gametes ◽  
Solanum Species ◽  
Endosperm Balance Number ◽  
Sexual Polyploidization ◽  
Ancestral Species ◽  
Origin And Evolution ◽  
Bilateral Sexual Polyploidization ◽  
2N Gamete

Abstract Polyploidization has played a major role in the origin and evolution of polyploid species. In this article we outline the unique characteristics of 2n gametes and implications of their participation in the evolution of polyploid Solanum species. The genetic consequences of 2n gametes indicate that sexual polyploidization results in greater variability, fitness, and heterozygosity than does somatic doubling. Further, the mechanisms of 2n gamete formation and the frequency of 2n gamete-forming genes in present polyploids and their ancestral species provide additional evidence of their involvement. Equally important is the endosperm, via the endosperm balance number (EBN) incompatibility system, in complementing the role of 2n gametes. In fact, the EBN system acts as a screen for either 1n or 2n gametes, depending on the EBN and chromosome numbers of parental species. EBN in combination with 2n gametes maintains the ploidy integrity of diploid ancestral species, while providing the flexibility for either unilateral or bilateral sexual polyploidization.

Mitotic-cycle time and the development of embryo and endosperm in compatible and incompatible crosses in tuber-bearing Solanum species

Genome ◽  
2001 ◽  
Vol 44 (3) ◽  
pp. 426-431 ◽  
Author(s):  
R W Masuelli
Keyword(s):  
Growth Rates ◽  
Doubling Time ◽  
Mitotic Cycle ◽  
Solanum Species ◽  
Endosperm Balance Number ◽  
Solanum Commersonii ◽  
Cell Doubling Time ◽  
The Mean ◽  
The Relationship ◽  
Solanum Spp

To understand the relationship between early seed development and the EBN (endosperm balance number) hypothesis, the embryo and endosperm growth rates in crosses among Solanum spp. with the same and different EBNs were analyzed. For the embryo, the differences in the mean cell-doubling time (MCDT) between the compatible species 2x Solanum gourlayi and Solanum acaule was 3.9 h, whereas the incompatible species Solanum commersonii had MCDT differences of 10 and 13.9 h with 2x S. gourlayi and S. acaule, respectively. The embryo growth rates of the 2EBN species S. acaule and S. gourlayi were almost twice as fast as that of the 1EBN species S. commersonii. Nuclei of variable sizes were observed in the endosperms resulting from incompatible crosses. The author discusses the possibility that the collapse of the endosperm in inter-EBN crosses could be caused by differences in the MCDT between the parents that produce hybrid endosperms with high levels of DNA synthesis and transcription activity, resulting in increased nuclear size. A model is proposed to explain the formation of enlarged endosperm nuclei in incompatible crosses in the genus Solanum.Key words: mean cell-doubling time, endosperm balance number, Solanum, endosperm, embryo.

Comparative Analysis of the Nutritional Profiles of Selected Solanum Species Grown in Sri Lanka

2021 ◽  
pp. 103847
Author(s):  
Harshani Nadeeshani ◽  
Gamini Samarasinghe ◽  
Swarna Wimalasiri ◽  
Renuka Silva ◽  
Danny Hunter ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Sri Lanka ◽  
Solanum Species ◽  
Nutritional Profiles

scholarly journals The presence of Phytophthora infestans in the rhizosphere of a wild Solanum species may contribute to off-season survival and pathogenicity

2020 ◽  
Vol 148 ◽  
pp. 103475 ◽  
Author(s):  
Ramesh R. Vetukuri ◽  
Laura Masini ◽  
Rebecca McDougal ◽  
Preeti Panda ◽  
Levine de Zinger ◽  
...  
Keyword(s):  
Phytophthora Infestans ◽  
Solanum Species ◽  
Wild Solanum Species ◽  
Wild Solanum
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